Results 81 to 90 of about 783,665 (255)

Astrometry of mutual approximations between natural satellites. Application to the Galilean moons [PDF]

, 2016
Typically we can deliver astrometric positions of natural satellites with errors in the 50-150 mas range. Apparent distances from mutual phenomena, have much smaller errors, less than 10 mas. However, this method can only be applied during the equinox of
Assafin, M., Camargo, J. I. B., Dias-Oliveira, A., Gomes-Júnior, A. R., Morgado, B., Vieira-Martins, R.   +5 more
core   +1 more source

Obliquity of the Galilean satellites: The influence of a global internal liquid layer [PDF]

, 2012
The obliquity of the Galilean satellites is small but not yet observed. Studies of cycloidal lineaments and strike-slip fault patterns on Europa suggest that Europa’s obliquity is about 1°, although theoretical models of the obliquity predict the ...
R. Baland, R. Baland, M. Yseboodt, T. Hoolst   +3 more
semanticscholar   +1 more source

THE RESULTS OF OBSERVATIONS OF MUTUAL PHENOMENA OF THE GALILEAN SATELLITES OF JUPITER IN 2009 AND 2015 IN NIKOLAEV ASTRONOMICAL OBSERVATORY

Odessa Astronomical Publications, 2016
The Earth and Jupiter once in 6 years have simultaneous passage of the ecliptic plane due to their orbital movement around the Sun. This makes it possible to observe the mutual occultations and eclipses in the Galilean satellites of Jupiter. We took part
A. Pomazan, N. Maigurova, V. Kryuchkovskiy   +2 more
doaj   +1 more source

Passive Microwave Radiometry and Active Radar Sounding as Complementary Tools for Geophysical Investigations of Icy Ocean Worlds

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Juno Microwave Radiometer (MWR) observations of Europa and Ganymede offer critical insights into the icy shells of these moons ahead of NASA's Europa Clipper and ESA's JUpiter ICy moons Explorer (JUICE) missions. Both missions are equipped with active radar sounders designed to address key unknowns such as ice shell thickness, thermal state ...
Natalie S. Wolfenbarger, Anna L. Broome, Dustin M. Schroeder, Anton I. Ermakov, Scott J. Bolton, Donald D. Blankenship   +5 more
wiley   +1 more source

Europa’s Sodium and Potassium Exosphere during Juno’s Flyby

The Planetary Science Journal
Jupiter’s icy moon Europa is enveloped in gaseous sodium and potassium that resonantly scatter sunlight as optical emission lines. The High Resolution Echelle Spectrograph on the Keck I telescope has spatially mapped these alkalis contemporaneously with ...
Emma Lovett, Carl Schmidt, Patrick Lierle   +2 more
doaj   +1 more source

Asymmetric Crater Relaxation on an Ice‐Rich Ceres Driven by Insolation

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Ceres has a high ice content within its crust and is the closest dwarf planet to the sun. The resultant high insolation levels at Ceres' surface (in comparison to the outer solar system) leads to high variations in surface temperature, which is dependent on both latitude and orientation of the slope (i.e., equatorward‐ or poleward‐facing).
I. F. Pamerleau, M. M. Sori, J. E. C. Scully   +2 more
wiley   +1 more source

Surface charging of thick porous water ice layers relevant for ion sputtering experiments [PDF]

, 2016
We use a laboratory facility to study the sputtering properties of centimeter-thick porous water ice subjected to the bombardment of ions and electrons to better understand the formation of exospheres of the icy moons of Jupiter.
Brouet, Y., Galli, A., Jost, B., Poch, O., Pommerol, A., Thomas, N., Tulej, M., Vorburger, A., Wurz, P.   +8 more
core   +2 more sources

Lava Lakes on Io: Crust Age and Implications for Thermal Output

The Planetary Science Journal
Recent observations by the JIRAM instrument on board NASA’s Juno spacecraft have confirmed that many of Io’s volcanic hotspots are active lava lakes, characterized by a colder central crust surrounded by a hotter peripheral ring.
Alessandro Mura, Rosaly M. C. Lopes, Federico Tosi, Peter J. Mouginis-Mark, Jani Radebaugh, Francesca Zambon, Matteo Paris, Scott Bolton, Alberto Adriani, Roberto Sordini, Andrea Cicchetti, Raffaella Noschese, Giuseppe Piccioni, Christina Plainaki, Giuseppe Sindoni   +14 more
doaj   +1 more source

Model pluralism for logic

Noûs, Volume 60, Issue 1, Page 136-160, March 2026.
Abstract It is well‐recognized in the sciences that a multitude of nonequivalent models are used by researchers to fulfill a range of goals, even for the same target system, a result known broadly as model pluralism. The possibility of the same form of pluralism occurring in logic, however, has not been adequately considered.
Ben Martin
wiley   +1 more source

Polarimetry of Water Ice Particles Providing Insights on Grain Size and Degree of Sintering on Icy Planetary Surfaces [PDF]

, 2018
The polarimetry of the light scattered by planetary surfaces is a powerful tool to provide constraints on their microstructure. To improve the interpretation of polarimetric data from icy surfaces, we have developed the POLarimeter for ICE Samples ...
Cerubini, Romain, Jost, Bernhard, Poch, Olivier, Pommerol, Antoine, Thomas, Nicolas   +4 more
core   +4 more sources